Stuffing-box arrangement for agitator-shafts in vacuum stirring apparatus.



No. 849,621. PATBNTED APR. 9, 1907.

' P. KEMPTER. STUFFING BOX ARRANGEMENT FOR AGITATOR SHAFTS IN VACUUM STIRRING APPARATUS.

APPLICATION FILED FEB. 15, 1906.

V II IIIIIIII/m UNITED STATES PATENT OFFICE.

FRITZ KEMPTER, OF STUTTGAQRT, GERMANY.

STUFFlNG-BOX ARRANGEMENT FOR AGITATOR-SHAFTS IN VACUUM STIRRING APPARATUS.

Specification of Letters Patent.

Patented April 9, 1907.

To all whom it may concern:

. Be it known that I, FRITZ KEMPTER, a sub ject of the King of Wiirtemberg, and a resident of Stuttgart, Kingdom of Wiirtemberg, German Empire, have invented a certain new anduseful Stufling-Box for Agitator-Shafts in Vacuum Stirring Apparatus, of which the following is a specification.

This invention relates to a bearing and stuffing-box for the shaft of vacuum stirring apparatus which is so constructed that the lubricating-oil is prevented from entering the vacuum-tank and injuriously affecting its contents.

The accompanying drawing represents a vertical longitudinal section of a Stllfllllg-bOX embodyingmy invention. a

(1 indicates the vacuum-tank. b indicates the agitator-shaft upon which the agitatorarms 0 c c are'mounted. The ulley 7 serves for im arting movement to t e shaft. On one si e of the tank a an air-tight casing (1 1s arranged which is provided at that end which is farthest away from the tank with a journal-box e for the shaft 1). The said journal-boX is shut ofi air-tight from the interior of the casing d by the stuffing-box The lubricating-cups g and it serve for the lubrication of the journal and of the stuffing-box, respectively. A ring i is mounted u on the shaft 1) between the oil-ducts g h 0 cups 9 h and the wall of tank a for the purpose of catching and throwing off any lubricating material which might run along the shaft. Windows '70 and l are provided for controlling and reaching the stuffing-box screws f and for removing any drippings of oil. In order to prevent the contents of the vacuum-tank from entering the casing d, a washer m, of rubber or the like, is provided at the oint where the agitator-shaft asses throng the wall of the tank. With t is arrangement it is impossible for any lubricating material to enter the vacuum-tank, inasmuch as even in case the oil should run down the agitatorshaft when the shaft is arrested the oil would still be revented from continuing to pass any fart er by the ring 4., and it is likely to be thrown off from the shaft when the machine is started. The oil which runs down directly from the stufling-box collects on top of the window 1.

The washer m does not close casing (1 airtight, and thus the vacuum in tank a will also exist in casing (1. Consequently the oil from the bearing cannot be sucked through casing (1 into the tank.

What I claim is- In a vacuum stirring apparatus, a vacuumtank, combined with an air-tight casing communicating therewith, a journal-box in the exterior wall of said casing, a shaft projecting from the tank through the easing into the journal-box, and a stuffing-box within the casing, substantially as specified.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

FRITZ KEMPTER. Witnesses:

A. KRETSCHMER, ERNST ENTENMANN. 

